摘要:
Provided are a fiber-reinforced plastic producing method capable of easily producing a fiber-reinforced plastic in which swelling and warpage are less likely to occur and of which excellent mechanical characteristics and isotropy are ensured, and a fiber-reinforced plastic in which swelling and warpage are suppressed from occurring. The fiber-reinforced plastic producing method has a step for obtaining a material (A) including a prepreg base material (12) in which a region (B) (17), where reinforcing fibers (13) pulled and aligned in one direction are impregnated with a matrix resin (14) and a plurality of cuts (b) (15) are formed, and a region (C) (18), where a plurality of cuts (c) (16) are formed, are alternately formed in a direction orthogonal to a fiber axis of the reinforcing fiber (13), a step for hot-pressing the material (A) while moving the material (A) under specific conditions, and a step for cooling the pressed material (A) to obtain the fiber-reinforced plastic.
摘要:
A microporous insulation material mixture is blended and the blended mixture is spread across a lower conveyor belt which is trained over rollers. To aid the spreading of the mixture a spreading device is used. The mixture is delivered by the conveyor to a pressing system which in this case comprises an upper conveyor belt. The pressing system also comprises a nipping means provided in this case by a plurality of upper and lower nipping rollers. The gaps between the individual rollers are adjustable. An upper fleece liner is led from a delivery roller to lie between the upper conveyor belt and the insulation mixture and a lower fleece liner is fed from a delivery roller to lie between the insulation mixture and the lower conveyor belt. The fleece liners may be used to encase the core prior to enclosing in an envelope and applying a vacuum.
摘要:
An apparatus for producing a web of fibrous material, characterised by comprising: includes a roll having incisions with a depth of 0.01-2.00 mm a width of 0.01-2.00 mm and a pitch 0.01-10.00 mm, and rotated at a peripheral velocity v1 equal to the velocity of an upstream apparatus unit; a belt stretched between transmission rollers that advances at a velocity v2 less than v1 where v1/v2 lies between 1.05 and 1.40; a presser roller rotating at a peripheral velocity v2, associated with a presser system acting to press the belt against said the metal roll with a pressure between 1 kg and 200 kg per centimeter; a system that feeds a sheet of pliable fibrous material between the belt and the roll, the belt elongating longitudinally no more than 5% dimensional stability along its entire length, and thickness between 1 cm and 10 cm, and hardness between 24° Shore and 70° Shore.
摘要:
The invention relates to mats or strips which are produced without vulcanization. It particularly relates to mats for use in railroad construction, for rail vehicles, in road construction or as conveyor belts. The mat or strip consists of at least one thermoplastic elastomer compound in the form of a powdered rubber-modified polymer alloy from powdered rubber and a main thermoplastic, the elastomer compound being free of dispersants and emulsifiers and being available as a powder, and the main thermoplastic being a polyester or polyurethane. The mat is puncture-resistant and has at least one layer.
摘要:
A system, method and apparatus for making endless belts having a profile layer, a fully embedded, helically wound, cord layer, and a top layer. The apparatus has a rotatable mandrel (2) with a profile complementary to the belt profile (1), two or one engagement rolls adjacent the mandrel to maintain forced, wrapped engagement of the profile layer on a portion thereof; a cord applicator which may include a heated blade (5) that plows a groove in the profile layer into which the cord is laid and fused thereto. A laminator applies the top layer onto the reinforced carcass. A system of buffer rolls (14) handles the loose portion of the profile layer or carcass guiding it.
摘要:
The invention relates to a device (1) for producing a slab (9) from artificial stone material by means of a double-belt press having a lower belt (2) and an upper belt (3), the double-belt press comprising a feeding device (4) for feeding a starting material for producing the slab (9) to the lower belt (2), and the feeding device (4) comprising at least one drum (5, 6) that is rotatable about its longitudinal axis (a1, a2).